발전용 증기터빈 밸브 케이싱의 유한요소해석과 주조결함 평가 방법
Finite Element Analysis and Evaluation of Casting Defects of Steam Turbine Valve Casings of Power Plants
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Abstract
Stresses of main stop valve and control valve casings for the steam turbines of power plants are analyzed by the finite element method. The stress intensity is obtained to check the results on the basis of the design criteria of ASME boiler and pressure vessel code. To verify accuracy of the finite element analysis, analyzed stresses are compared with those measured during the hydrostatic pressure test. Stress category drawings, which play an important role in evaluating casting defects, are produced from the analysis results, and important points in casting of the valve casings are discussed in terms of the stress category.
참고문헌 (9)
- A. Leyzerovich, "Large Power Steam Turbines: Design and Operation", 1 (1997), Pennwell Publishing Co.
- Section Ⅰ, "Rules for Construction of Power Boilers" (1996), ASME Boiler and Pressure Vessel Code
- Section Ⅷ, "Rules for Construction of Pressure Vessel", pp.~1 (1996), ASME Boiler and Pressure Vessel Code
- Section Ⅷ, "Rules for Construction of Pressure Vessel - Alternative Rules", pp.~2 (1996), ASME Boiler and Pressure Vessel Code
- R. L. Carson, "Design and Experience With Steam Valves for Utility Steam Turbines" (1985)
- 조종래, "정상상태의 열전달 계수 예측을 위한 최적화 기법의 열전도 역문제에 관한 연구", 21(5), pp.87~94 (1997)
- 하준욱, "화력발전용 증기터빈 밸브 케이싱의 수명 설계를 위한 최대허용온도차 계산", 16(8), pp.46~52 (1999)
- J. M. Blanchard, "Valve Casing Defect Repair" (1969)
- J. Polacek, "Instruction for the Repair of Cast and Fabricated Turbine Valve Casings and Valve Casing Attachments" (1978)